PHP中file_get_contents高級用法实例_PHP
本文实例讲述了PHP中file_get_contents高级用法,分享给大家供大家参考。具体分析如下:
首先解决file_get_contents的超时问题,在超时返回错误后就象js中的settimeout那样进行一次尝试,错误超过3次或者5次后就确认为无法连线伺服器而彻底放弃。
这裡就简单介绍两种解决方法:
一、增加超时的时间限制
注意:set_time_limit只是设定你的PHP程式的超时时间,而不是file_get_contents函数读取URL的超时时间。
我一开始以为set_time_limit也能影响到file_get_contents,后来经测试是无效的。真正的修改file_get_contents延时可以用resource $context的timeout参数:
PHP程序代码如下:
$opts = array( 'http'=>array( 'method'=>"GET", 'timeout'=>60, ) ); $context = stream_context_create($opts); $html =file_get_contents('http://www.bitsCN.com', false, $context); fpassthru($fp);
二、多次尝试
PHP程序代码如下:
$cnt=0; while($cnt < 3 && ($str=@file_get_contents('http...'))===FALSE){ $cnt++; }
以上方法对付超时已经OK了。接下来演示一下用file_get_contents实现Post,如下:
PHP程序代码
function Post($url, $post = null){ $context = array(); if (is_array($post)) { ksort($post); $context['http'] = array ( 'timeout'=>60, 'method' => 'POST', 'content' => http_build_query($post, '', '&'), ); } return file_get_contents($url, false, stream_context_create($context)); } $data = array ( 'name' => 'test', 'email' => 'test@gmail.com', 'submit' => 'submit', ); echo Post('http://www.bitsCN.com', $data);
注意文档头的Set_time_out否则整个文档都得超时了。
希望本文所述对大家php程序设计的学习有所帮助。

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